18 millimeters in decimeters

Result

The conversion result is: 18 millimeters is equivalent to 0.18 decimeters.^[1]

Conversion formula
How to convert 18 millimeters to decimeters?

We know (by definition) that: 1 mm = 0.01 dm.

We can set up a proportion to solve for the number of decimeters.

1 mm / 18 mm = 0.01 dm / x dm

Now, we cross multiply to solve for our unknown x:

x dm = (18 mm / 1 mm) * 0.01 dm → x dm = 0.18 dm

Conclusion:

18 mm = 0.18 dm

Conversion in the opposite direction

The inverse of the conversion factor is that 1 decimeter is equal to 5.55555555555556 times 18 millimeters.

It can also be expressed as: 18 millimeters is equal to 1 / 5.55555555555556 decimeters.

Approximation

An approximate numerical result would be: eighteen millimeters is about zero decimeters, or alternatively, a decimeter is about five point five five times eighteen millimeters.